instructioncounter.java

ProGuard 是一个免费的 Java类文件的压缩

/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2007 Eric Lafortune ([e-mail])
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.instruction.visitor;

import proguard.classfile.*;
import proguard.classfile.attribute.CodeAttribute;
import proguard.classfile.instruction.visitor.InstructionVisitor;
import proguard.classfile.instruction.*;

/**
 * This InstructionVisitor counts the number of instructions that has been visited.
 *
 * @author Eric Lafortune
 */
public class InstructionCounter implements InstructionVisitor
{
    private int count;


    /**
     * Returns the number of instructions that has been visited so far.
     */
    public int getCount()
    {
        return count;
    }


    // Implementations for InstructionVisitor.

    public void visitBranchInstruction(Clazz             clazz,
                                       Method            method,
                                       CodeAttribute     codeAttribute,
                                       int               offset,
                                       BranchInstruction branchInstruction)
    {
        count++;
    }


    public void visitConstantInstruction(Clazz         clazz,
                                   Method        method,
                                   CodeAttribute codeAttribute,
                                   int           offset,
                                   ConstantInstruction constantInstruction)
    {
        count++;
    }


    public void visitLookUpSwitchInstruction(Clazz                   clazz,
                                             Method                  method,
                                             CodeAttribute           codeAttribute,
                                             int                     offset,
                                             LookUpSwitchInstruction lookUpSwitchInstruction)
    {
        count++;
    }


    public void visitSimpleInstruction(Clazz             clazz,
                                       Method            method,
                                       CodeAttribute     codeAttribute,
                                       int               offset,
                                       SimpleInstruction simpleInstruction)
    {
        count++;
    }


    public void visitTableSwitchInstruction(Clazz                  clazz,
                                            Method                 method,
                                            CodeAttribute          codeAttribute,
                                            int                    offset,
                                            TableSwitchInstruction tableSwitchInstruction)
    {
        count++;
    }


    public void visitVariableInstruction(Clazz               clazz,
                                         Method              method,
                                         CodeAttribute       codeAttribute,
                                         int                 offset,
                                         VariableInstruction variableInstruction)
    {
        count++;
    }
}